ns-02.sdn.spb.ru has no NS records.
NS records for this zone are defined at sdn.spb.ru.
NS records for this zone are defined at sdn.spb.ru.
Question and response
Question
dig ns-02.sdn.spb.ru. NS
Answer
The response has no answer records.
Authority
sdn.spb.ru. 86400 SOA ns-01.stackdata.net. hostmaster.stackdata.net. 2025032601 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0